EP1978368A1 - Vorrichtung zur automatischen sukzessiven Online-Entnahme einer Serie von Proben aus einer zu analysierenden Flüssigkeit sowie Umsetzungsverfahren nach dem Einsatz einer solchen Vorrichtung - Google Patents

Vorrichtung zur automatischen sukzessiven Online-Entnahme einer Serie von Proben aus einer zu analysierenden Flüssigkeit sowie Umsetzungsverfahren nach dem Einsatz einer solchen Vorrichtung Download PDF

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Publication number
EP1978368A1
EP1978368A1 EP08300117A EP08300117A EP1978368A1 EP 1978368 A1 EP1978368 A1 EP 1978368A1 EP 08300117 A EP08300117 A EP 08300117A EP 08300117 A EP08300117 A EP 08300117A EP 1978368 A1 EP1978368 A1 EP 1978368A1
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EP
European Patent Office
Prior art keywords
sample
liquid
valve
analyzed
analysis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08300117A
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English (en)
French (fr)
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EP1978368B1 (de
Inventor
Viachaslau Urvantsau
Hervé CLERIS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Instrumentation Scientifique de Laboratoire ISL SA
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Instrumentation Scientifique de Laboratoire ISL SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication of EP1978368A1 publication Critical patent/EP1978368A1/de
Application granted granted Critical
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
    • G01N35/1095—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers
    • G01N35/1097—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices for supplying the samples to flow-through analysers characterised by the valves

Definitions

  • the subject of the present invention is a device for successive automatic sampling in line, on a main pipeline, in particular on a pipeline of an installation for the industrial production of petroleum products, of a series of samples of a liquid to be analyzed in an analysis cell.
  • such an analysis cell may advantageously be constituted by an automatic distillation apparatus suitable for measuring the distillation parameters of samples of petroleum products. respecting a predefined test standard.
  • distillation parameters of petroleum products are representative of the performance of these products as well as the risks that they may incur to their users.
  • mini-distillation apparatuses are further distinguished by the fact that the characteristics of the samples analyzed are directly determined from temperature and pressure measurements, without the need to measure the volume of condensate collected in the measuring cylinder.
  • Such laboratory apparatuses which are for example described in the document FR 2 815 413 , are equipped with analysis flasks whose spherical portion cooperates with a heating element such as a heating resistor and whose neck has a lateral capillary connected to a condenser tube and is closed by a cap equipped with a temperature sensor which plunged into the sample, as well as a differential sensor to measure the pressure prevailing near the inlet of the capillary.
  • the object of the present invention is to propose an on-line automatic sampling device of a series of samples of a liquid to be analyzed in an analysis cell which can remedy these drawbacks.
  • such an automatic sampling device is characterized in that it comprises a rotary valve associated with a predefined volume sample reservoir corresponding to the sample dose to be introduced into the analysis cell when each analysis.
  • the rotary valve may advantageously be constituted by a six-way valve.
  • the operating mode of the sampling device which is the subject of the invention is therefore based on the constant provision in the sample reservoir of a sample volume corresponding to the volume to be introduced into the cell of the invention. analysis during each test to allow its transfer to this cell and the permanent renewal of this volume.
  • the filling circuit comprises a buffer volume pneumatic chamber adapted to that of the sample reservoir and mounted upstream of this reservoir in the direction of displacement of the compressed gas.
  • This pneumatic buffer chamber is advantageously equipped with a pressure sensor for monitoring the transfer of the sample dose of liquid to be analyzed contained in the sample reservoir to the analysis cell.
  • a capillary mounted on the filling circuit, between the pneumatic buffer chamber and the sample reservoir, makes it possible to control this transfer by preventing it from being too abrupt.
  • the invention also relates to a method implemented following the use of the aforementioned device.
  • the pressure sensor is continuously monitored to verify that the entire sample dose contained in the sample reservoir has indeed been transferred to the analysis cell.
  • the presence of the capillary makes it possible to limit the flow of sample transferred to the analysis cell.
  • an increase in the time required for the introduction of a sample dose into the analysis cell is likely to reveal a beginning of obstruction of the device, and therefore the need for a Preventive maintenance.
  • the implementation of the aforementioned method according to the invention requires the presence of a series of valves for controlling the circulation of the liquid to be analyzed in the transfer circuit and the circulation of the compressed gas in the filling circuit, and the presence of control and regulation means for managing the opening and closing of these different valves according to the successive analyzes to be performed.
  • the device and the method according to the invention can be used to manage the analysis of different liquid samples.
  • the sampling device essentially comprises a six-way valve 1 associated with a sample reservoir 2 whose volume corresponds to a dose of sample to be introduced into an analysis cell 3 provided with a vent to perform a test.
  • the rotation of the six-way valve 1 shown schematically by the double arrow A causes the displacement of this valve between a circulation position in which it allows the passage of a fluid by the paths schematized in black and a loading position in which it allows the passage of a fluid by the paths schematized in gray.
  • the sample reservoir 2 is connected to a transfer circuit 4 schematized in solid lines on the figure 2 which is mounted in shunt on a main pipe not shown.
  • the liquid to be analyzed thus enters the transfer circuit 4 via an inlet 5 to exit through an outlet 6.
  • the sample reservoir 2 When the six-way valve 1 is in the loading position, the sample reservoir 2 is connected to a filling circuit 7 schematized in solid lines on the figure 3 which connects the analysis cell 3 to a source of compressed gas 8 equipped with a shut-off valve 9.
  • the filling circuit 7 further comprises a pneumatic buffer chamber 10 whose volume is adapted to that of the sample reservoir 2.
  • the buffer air chamber 10 is mounted upstream of the sample tank 2 in the direction of displacement of the compressed gas.
  • the pneumatic buffer chamber 10 is further equipped with a pressure sensor 11.
  • a capillary 12 is furthermore mounted between the pneumatic buffer chamber 10 and the sample reservoir 2.
  • the liquid to be analyzed circulates continuously in the transfer circuit 4 connected in shunt on the main line between the inlet 5 and the outlet 6 of this circuit.
  • the dose of liquid contained in the sample tank 2 is thus constantly renewed.
  • a dose of compressed gas is then introduced into the filling circuit and pushes the sample dose contained in the sample volume 2 towards the analysis cell 3.
  • the capillary 12 mounted downstream of the pneumatic buffer chamber 10 allows timing this introduction.
  • the pressure sensor 11 constantly monitors the pressure in the pneumatic buffer chamber 10 so as to verify that the entire sample dose has actually been transferred to the analysis cell 3.
  • control and regulation means make it possible to control a series of unrepresented valves as well as the six-way valve 1 to return it to the circulating position and to allow the continuous circulation of the liquid to be analyzed in the circuit. transfer 4.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
EP08300117A 2007-04-06 2008-02-27 Vorrichtung zur automatischen sukzessiven Online-Entnahme einer Serie von Proben aus einer zu analysierenden Flüssigkeit sowie Umsetzungsverfahren nach dem Einsatz einer solchen Vorrichtung Active EP1978368B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0754354A FR2914749B1 (fr) 2007-04-06 2007-04-06 Dispositif de prelevement automatique successif en ligne d'une serie d'echantillons d'un liquide a analyser ainsi que procede mis en oeuvre suite a l'utilisation de ce dispositif

Publications (2)

Publication Number Publication Date
EP1978368A1 true EP1978368A1 (de) 2008-10-08
EP1978368B1 EP1978368B1 (de) 2010-05-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08300117A Active EP1978368B1 (de) 2007-04-06 2008-02-27 Vorrichtung zur automatischen sukzessiven Online-Entnahme einer Serie von Proben aus einer zu analysierenden Flüssigkeit sowie Umsetzungsverfahren nach dem Einsatz einer solchen Vorrichtung

Country Status (4)

Country Link
EP (1) EP1978368B1 (de)
AT (1) ATE467838T1 (de)
DE (1) DE602008001191D1 (de)
FR (1) FR2914749B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103499703A (zh) * 2008-12-18 2014-01-08 Emd密理博公司 用于传送介质的装置
CN107632099A (zh) * 2017-08-31 2018-01-26 天津市鹏翔科技有限公司 一种智能在线连续取样自动分析系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918913A (en) * 1974-12-02 1975-11-11 Lilly Co Eli Sampler-injector for liquid chromatography
US4987785A (en) * 1990-04-04 1991-01-29 Spencer R Wilson Constant volume sampling system
FR2815413A1 (fr) 2000-10-17 2002-04-19 Instrumentation Scient De Labo Procede de determination des caracteristiques de distillation de produits petroliers liquides par mini-distillation express ainsi qu'appareil permettant la mise en oeuvre de ce procede
EP1333348A1 (de) * 2002-02-05 2003-08-06 Avantium International B.V. Gegendruckregler
US20050053522A1 (en) * 2003-09-10 2005-03-10 King Mackenzie E. Sampling management for a process analysis tool to minimize sample usage and decrease sampling time

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918913A (en) * 1974-12-02 1975-11-11 Lilly Co Eli Sampler-injector for liquid chromatography
US4987785A (en) * 1990-04-04 1991-01-29 Spencer R Wilson Constant volume sampling system
FR2815413A1 (fr) 2000-10-17 2002-04-19 Instrumentation Scient De Labo Procede de determination des caracteristiques de distillation de produits petroliers liquides par mini-distillation express ainsi qu'appareil permettant la mise en oeuvre de ce procede
EP1333348A1 (de) * 2002-02-05 2003-08-06 Avantium International B.V. Gegendruckregler
US20050053522A1 (en) * 2003-09-10 2005-03-10 King Mackenzie E. Sampling management for a process analysis tool to minimize sample usage and decrease sampling time

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103499703A (zh) * 2008-12-18 2014-01-08 Emd密理博公司 用于传送介质的装置
CN103499703B (zh) * 2008-12-18 2015-09-30 Emd密理博公司 用于传送介质的装置
CN107632099A (zh) * 2017-08-31 2018-01-26 天津市鹏翔科技有限公司 一种智能在线连续取样自动分析系统及方法

Also Published As

Publication number Publication date
FR2914749A1 (fr) 2008-10-10
ATE467838T1 (de) 2010-05-15
EP1978368B1 (de) 2010-05-12
FR2914749B1 (fr) 2009-07-31
DE602008001191D1 (de) 2010-06-24

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